<template>
  <div class="login">
      <van-nav-bar title="会员登录" left-arrow @click-left="$router.go(-1)" />
      <div class="container">
        <div class="title">
          <h3>手机号登录</h3>
          <p>未注册的手机号登录后将自动注册</p>
        </div>

  <div class="form">
    <div class="form-item">
      <input  v-model="mobile" class="inp" maxlength="11" placeholder="请输入手机号码" type="text">
    </div>
    <div class="form-item">
      <input  v-model="picCode" class="inp" maxlength="5" placeholder="请输入图形验证码" type="text">
      <img v-if="picUrl" :src="picUrl"  alt="">
    </div>
    <div class="form-item">
      <input v-model="msgCode" class="inp" placeholder="请输入短信验证码" type="text">
      <button @click="getCode">{{second===totalSecond?'获取验证码':second+'秒后重新获取'}}</button>
    </div>
  </div>
  <div class="login-btn" @click="login">登录</div>
</div>
  </div>
</template>
<script>
import { getPicCode, getPhoneCode, codeLogin } from '@/api/login'
export default {
  name: 'LoginIndex',
  data () {
    return {
      picCode: '', // 用户输入的图形验证码
      picKey: '', // 将来请求传递的图形验证码唯一标识
      picUrl: '', // 存储请求渲染的图片地址
      mobile: '', // 手机号
      msgCode: '', // 短信验证码
      totalSecond: 60, // 总秒数
      second: 60, // 倒计时的秒数
      timer: null // 定时器
    }
  },
  async created () {
    this.getPicCode()
  },
  methods: {
    async getPicCode () {
      // const res = await getPicCode()
      // console.log(res)
      const { data: { base64, key } } = await getPicCode()
      this.picUrl = base64
      this.picKey = key
      this.$toast('获取验证码成功')
    },
    // 校验输入框内容
    validFn () {
      if (!/^1[3-9]\d{9}$/.test(this.mobile)) {
        this.$toast('请输入正确的手机号')
        return false
      }
      if (!/^\w{4}$/.test(this.picCode)) {
        this.$toast('请输入正确的图形验证码')
        return false
      }
      return true
    },

    // 获取验证码
    async  getCode () {
      if (!this.validFn()) {
        // 如果没有通过校验，就没必要往下了
        return
      }
      // 开启定时器
      if (!this.timer && this.second === this.totalSecond) {
        // 发送请求，获取验证码(如果status不是200，就拦截)
        await getPhoneCode(this.picCode, this.picKey, this.mobile)
        // console.log(res)
        this.$toast('验证码发送成功')
        // 开启倒计时
        this.timer = setInterval(() => {
          this.second--
          if (this.second <= 0) {
            clearInterval(this.timer)
            this.timer = null// 重置定时器id
            this.second = this.totalSecond// 归位
          }
        }, 1000)
      }
    },
    // 登录验证
    async login () {
      if (!this.validFn()) return
      if (!/^\d{6}$/.test(this.msgCode)) {
        this.$toast('请输入正确的手机验证码')
        return
      }
      const res = await codeLogin(this.mobile, this.msgCode)
      // console.log(res)
      //  将token  和  userId  存储
      this.$store.commit('user/setUserInfo', res.data)
      this.$toast('登录成功')

      // 判断地址栏中是否有回跳地址
      // 如果有，那就回跳，否则跳转到首页
      // if (this.$route.query.backUrl) {
      //   this.$router.push(this.$route.query.backUrl)
      // }

      const url = this.$route.query.backUrl || '/'
      this.$router.replace(url)
    }
  },

  // 离开当前页面就清除定时器
  destroyed () {
    clearInterval(this.timer)
  }

}
</script>
<style scoped lang='less'>
.container{
  padding: 49px 49px;
  .title{
    h3{
      font-size:26px;
      font-weight:normal ;
    }
      p {
      line-height: 40px;
      font-size: 14px;
      color: #b8b8b8;
    }
  }
}
.form-item {
    border-bottom: 1px solid #f3f1f2;
    padding: 8px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    .inp {
      display: block;
      border: none;
      outline: none;
      height: 32px;
      font-size: 14px;
      flex: 1;
    }
    img {
      width: 94px;
      height: 31px;
    }
    button {
      height: 31px;
      border: none;
      font-size: 13px;
      color: #cea26a;
      background-color: transparent;
      padding-right: 9px;
    }
  }

  .login-btn {
    width: 100%;
    height: 42px;
    margin-top: 39px;
    background: linear-gradient(90deg,#38b4c0,#3353ba);
    color: #fff;
    border-radius: 39px;
    box-shadow: 0 10px 20px 0 rgba(0,0,0,.1);
    letter-spacing: 2px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

</style>
